ar71xx_ehci.c

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    1 /*-
    2  * Copyright (c) 2008 Sam Leffler.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   23  */
   24 
   25 /*
   26  * AR71XX attachment driver for the USB Enhanced Host Controller.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/8.2/sys/mips/atheros/ar71xx_ehci.c 215938 2010-11-27 12:26:40Z jchandra $");
   31 
   32 #include "opt_bus.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/bus.h>
   37 #include <sys/rman.h>
   38 #include <sys/condvar.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 
   42 #include <machine/bus.h>
   43 
   44 #include <dev/usb/usb.h>
   45 #include <dev/usb/usbdi.h>
   46 
   47 #include <dev/usb/usb_core.h>
   48 #include <dev/usb/usb_busdma.h>
   49 #include <dev/usb/usb_process.h>
   50 #include <dev/usb/usb_util.h>
   51 
   52 #include <dev/usb/usb_controller.h>
   53 #include <dev/usb/usb_bus.h>
   54 #include <dev/usb/controller/ehci.h>
   55 #include <dev/usb/controller/ehcireg.h>
   56 
   57 #include <mips/atheros/ar71xx_bus_space_reversed.h>
   58 
   59 #define EHCI_HC_DEVSTR          "AR71XX Integrated USB 2.0 controller"
   60 
   61 struct ar71xx_ehci_softc {
   62         ehci_softc_t            base;   /* storage for EHCI code */
   63 };
   64 
   65 static device_attach_t ar71xx_ehci_attach;
   66 static device_detach_t ar71xx_ehci_detach;
   67 static device_shutdown_t ar71xx_ehci_shutdown;
   68 static device_suspend_t ar71xx_ehci_suspend;
   69 static device_resume_t ar71xx_ehci_resume;
   70 
   71 bs_r_1_proto(reversed);
   72 bs_w_1_proto(reversed);
   73 
   74 static int
   75 ar71xx_ehci_suspend(device_t self)
   76 {
   77         ehci_softc_t *sc = device_get_softc(self);
   78         int err;
   79 
   80         err = bus_generic_suspend(self);
   81         if (err)
   82                 return (err);
   83         ehci_suspend(sc);
   84         return (0);
   85 }
   86 
   87 static int
   88 ar71xx_ehci_resume(device_t self)
   89 {
   90         ehci_softc_t *sc = device_get_softc(self);
   91 
   92         ehci_resume(sc);
   93 
   94         bus_generic_resume(self);
   95 
   96         return (0);
   97 }
   98 
   99 static int
  100 ar71xx_ehci_shutdown(device_t self)
  101 {
  102         ehci_softc_t *sc = device_get_softc(self);
  103         int err;
  104 
  105         err = bus_generic_shutdown(self);
  106         if (err)
  107                 return (err);
  108         ehci_shutdown(sc);
  109 
  110         return (0);
  111 }
  112 
  113 static int
  114 ar71xx_ehci_probe(device_t self)
  115 {
  116 
  117         device_set_desc(self, EHCI_HC_DEVSTR);
  118 
  119         return (BUS_PROBE_DEFAULT);
  120 }
  121 
  122 static int
  123 ar71xx_ehci_attach(device_t self)
  124 {
  125         struct ar71xx_ehci_softc *isc = device_get_softc(self);
  126         ehci_softc_t *sc = &isc->base;
  127         int err;
  128         int rid;
  129 
  130         /* initialise some bus fields */
  131         sc->sc_bus.parent = self;
  132         sc->sc_bus.devices = sc->sc_devices;
  133         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  134 
  135         /* get all DMA memory */
  136         if (usb_bus_mem_alloc_all(&sc->sc_bus,
  137             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
  138                 return (ENOMEM);
  139         }
  140 
  141         sc->sc_bus.usbrev = USB_REV_2_0;
  142 
  143         /* NB: hints fix the memory location and irq */
  144 
  145         rid = 0;
  146         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  147         if (!sc->sc_io_res) {
  148                 device_printf(self, "Could not map memory\n");
  149                 goto error;
  150         }
  151 
  152         /*
  153          * Craft special resource for bus space ops that handle
  154          * byte-alignment of non-word addresses.  
  155          */
  156         sc->sc_io_tag = ar71xx_bus_space_reversed;
  157         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
  158         sc->sc_io_size = rman_get_size(sc->sc_io_res);
  159 
  160         rid = 0;
  161         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  162             RF_ACTIVE);
  163         if (sc->sc_irq_res == NULL) {
  164                 device_printf(self, "Could not allocate irq\n");
  165                 goto error;
  166         }
  167         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  168         if (!sc->sc_bus.bdev) {
  169                 device_printf(self, "Could not add USB device\n");
  170                 goto error;
  171         }
  172         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  173         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  174 
  175         sprintf(sc->sc_vendor, "Atheros");
  176 
  177 
  178         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  179             NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  180         if (err) {
  181                 device_printf(self, "Could not setup irq, %d\n", err);
  182                 sc->sc_intr_hdl = NULL;
  183                 goto error;
  184         }
  185 
  186         /*
  187          * Arrange to force Host mode, select big-endian byte alignment,
  188          * and arrange to not terminate reset operations (the adapter
  189          * will ignore it if we do but might as well save a reg write).
  190          * Also, the controller has an embedded Transaction Translator
  191          * which means port speed must be read from the Port Status
  192          * register following a port enable.
  193          */
  194         sc->sc_flags = EHCI_SCFLG_SETMODE;
  195         (void) ehci_reset(sc);
  196 
  197         err = ehci_init(sc);
  198         if (!err) {
  199                 err = device_probe_and_attach(sc->sc_bus.bdev);
  200         }
  201         if (err) {
  202                 device_printf(self, "USB init failed err=%d\n", err);
  203                 goto error;
  204         }
  205         return (0);
  206 
  207 error:
  208         ar71xx_ehci_detach(self);
  209         return (ENXIO);
  210 }
  211 
  212 static int
  213 ar71xx_ehci_detach(device_t self)
  214 {
  215         struct ar71xx_ehci_softc *isc = device_get_softc(self);
  216         ehci_softc_t *sc = &isc->base;
  217         device_t bdev;
  218         int err;
  219 
  220         if (sc->sc_bus.bdev) {
  221                 bdev = sc->sc_bus.bdev;
  222                 device_detach(bdev);
  223                 device_delete_child(self, bdev);
  224         }
  225         /* during module unload there are lots of children leftover */
  226         device_delete_all_children(self);
  227 
  228         /*
  229          * disable interrupts that might have been switched on in ehci_init
  230          */
  231         if (sc->sc_io_res) {
  232                 EWRITE4(sc, EHCI_USBINTR, 0);
  233         }
  234 
  235         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  236                 /*
  237                  * only call ehci_detach() after ehci_init()
  238                  */
  239                 ehci_detach(sc);
  240 
  241                 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  242 
  243                 if (err)
  244                         /* XXX or should we panic? */
  245                         device_printf(self, "Could not tear down irq, %d\n",
  246                             err);
  247                 sc->sc_intr_hdl = NULL;
  248         }
  249 
  250         if (sc->sc_irq_res) {
  251                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
  252                 sc->sc_irq_res = NULL;
  253         }
  254         if (sc->sc_io_res) {
  255                 bus_release_resource(self, SYS_RES_MEMORY, 0,
  256                     sc->sc_io_res);
  257                 sc->sc_io_res = NULL;
  258         }
  259         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  260 
  261         return (0);
  262 }
  263 
  264 static device_method_t ehci_methods[] = {
  265         /* Device interface */
  266         DEVMETHOD(device_probe, ar71xx_ehci_probe),
  267         DEVMETHOD(device_attach, ar71xx_ehci_attach),
  268         DEVMETHOD(device_detach, ar71xx_ehci_detach),
  269         DEVMETHOD(device_suspend, ar71xx_ehci_suspend),
  270         DEVMETHOD(device_resume, ar71xx_ehci_resume),
  271         DEVMETHOD(device_shutdown, ar71xx_ehci_shutdown),
  272 
  273         /* Bus interface */
  274         DEVMETHOD(bus_print_child, bus_generic_print_child),
  275 
  276         {0, 0}
  277 };
  278 
  279 static driver_t ehci_driver = {
  280         "ehci",
  281         ehci_methods,
  282         sizeof(struct ar71xx_ehci_softc),
  283 };
  284 
  285 static devclass_t ehci_devclass;
  286 
  287 DRIVER_MODULE(ehci, nexus, ehci_driver, ehci_devclass, 0, 0);
  288 MODULE_DEPEND(ehci, usb, 1, 1, 1);

Cache object: 72a6b1a311c5a70068bf25e6541f9c4c

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FreeBSD/Linux Kernel Cross Reference sys/mips/atheros/ar71xx_ehci.c

FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar71xx_ehci.c